Xia and Yuudou have been dating for six months. Their relationship has always been simple, but one day, on her way home from school, a middle-aged man named Goro suddenly appears and forces her into his room. For Natsu, who loves cleanliness, a room full of garbage and smelling of sweat is hell. Despite Natsu's resistance, Goro rapes her, and she is tormented by her guilt over Yuudou. She tries to escape, but then Goro threatens her and calls her back. When she reluctantly obeys Goro's orders, she experiences an unknown pleasure...